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chmod Calculator

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Owner
Group
Others
Read
Write
Execute

Toggle read/write/execute for owner, group, and others — including setuid, setgid, and sticky bit from the start, not gated behind a separate "Pro" tool — and get a ready-to-copy chmod command instantly.

How it works

  1. Check the permissions you want, or type an octal (755) or symbolic (rwxr-xr-x) value directly
  2. Everything stays in sync both ways — checkboxes, octal, and symbolic notation
  3. A complete chmod command (with an optional -R for recursive) is ready to copy

Frequently asked questions

What do setuid, setgid, and sticky bit mean?

They're special permission bits — setuid/setgid run a program with the file owner's/group's privileges, and the sticky bit (common on shared directories like /tmp) restricts file deletion to the file's owner.

Can I type an octal or symbolic value directly instead of clicking checkboxes?

Yes — type into either field and the checkboxes, the other notation, and the command all update to match.

Does this cover ACLs or Windows permissions?

No — this covers standard Unix/Linux/macOS chmod permissions only.

#ChmodCalculator#ChmodOctalToSymbolic#ChmodSetuidSetgidStickyBit#UnixFilePermissionsCalculator

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From the blog

setuid, setgid, and the sticky bit are usually in the "Pro" chmod calculator, not the free one
dev

setuid, setgid, and the sticky bit are usually in the "Pro" chmod calculator, not the free one

Several chmod tools split their basic checkbox calculator from an "Advanced" or "Pro" version that actually handles special permission bits. We put them in the same tool.

2026-08-30

Update history

  • 2026-08-30 Added: a cover image (a padlock combined with a folder icon next to a grid of permission toggle switches) — used as the card thumbnail, social share image, and blog title image.
  • 2026-08-30 Launched: live chmod calculator (no button) — toggle read/write/execute plus setuid/setgid/sticky bit checkboxes, or type octal/symbolic directly; a ready-to-copy chmod command (with optional -R) updates live.